BMW M30

{{Infobox automobile engine |name=BMW M30 engine |image=BMW E28 motor.jpg |production=1968–1995 |configuration= [[Straight-six engine|Straight-6]] |valvetrain= [[Overhead camshaft#Single overhead camshaft|SOHC]] |block= [[Cast iron]] |head= [[Aluminium]] |fueltype=[[Petrol engine|Petrol]] |displacement={{ubl | {{cvt|2494|cc|CID|0}} | {{cvt|2788|cc|CID|0}} | {{cvt|2986|cc|CID|0}} | {{cvt|3210|cc|CID|0}} | {{cvt|3295|cc|CID|0}} | {{cvt|3430|cc|CID|0}} }} |bore = {{ubl | {{cvt|86.0|mm|in|1}} | {{cvt|89.0|mm|in|1}} | {{cvt|92.0|mm|in|1}} }} |stroke = {{ubl | {{cvt|71.6|mm|in|1}} | {{cvt|80.0|mm|in|1}} | {{cvt|86.0|mm|in|1}} | {{cvt|88.0|mm|in|1}} }} |predecessor=[[BMW M20]] |successor=[[BMW M50]] }}

The '''BMW M30''' is a SOHC [[straight-six]] petrol engine which was produced from 1968 to 1995. With a production run of 27 years, it is BMW's longest produced engine and was used in many car models.

The first models to use the M30 engine were the [[BMW New Six#Sedans (E3)|BMW 2500 and 2800]] sedans and the [[BMW E9#2800 CS|2800 CS]] coupe, which entered production in 1968. The initial M30 models were produced in displacements of {{convert|2494|cc|L|1|disp=flip}} and {{convert|2788|cc|L|1|disp=flip}}. Larger displacement versions were introduced over time, with the largest version being {{convert|3430|cc|cuin|1|abbr=on}}, which was sometimes badged as "3.5 litres".<ref>{{cite web|title=Bmw Engine and Powerplant Identification Codes|url=http://www.rtsauto.com/bmw-engine-and-powerplant-identification-codes/|website=www.rtsauto.com|date=8 July 2010 |access-date=8 September 2017}}</ref> As per the [[BMW M10]] four-cylinder engine from which the M30 was developed, the M30 has an iron block, an aluminium head and an overhead camshaft with two valves per cylinder.

The engine was given the nicknames of 'Big Six' and 'Senior Six', following the introduction of the smaller [[BMW M20]] straight-six engine in the late 1970s. The M30 was produced alongside the M20 throughout the M20's production, and prior to the introduction of the [[BMW M70]] V12 engine in 1987, the M30 was BMW's most powerful and largest regular production engine.

Following the introduction of the [[BMW M50]] engine in 1990, the M30 began to be phased out.

Ward's have rated the M30 as one of the "Top Engines of the 20th Century".<ref>{{cite web|title=Ward's 10 Best Engines include 2 BMW sixes|url=http://www.pacemotors.com.au/ArticleView.asp?ArticleID=4|website=www.pacemotors.com.au|archive-url=https://web.archive.org/web/20070522185127/http://www.pacemotors.com.au/ArticleView.asp?ArticleID=4|archive-date=22 May 2007}}</ref>

==Design== The M30 was originally developed in the late 1960s, loosely based on the BMW M10 four-cylinder engine first used in the [[BMW New Class]] sedans and coupes.<ref name="AU71">{{citation | ref = AU71 | journal = Auto-Universum 1971 | title = BMW 2500/2800 | last = Becker | first = Clauspeter | editor-first = Arthur | editor-last = Logoz | date = 1971 | publisher = Verlag Internationale Automobil-Parade AG | location = Zürich, Switzerland | volume = XIV | language = de }}</ref>{{refpage|page=70}} Initially, the engine code was "M06" and the "M68", until all versions began to use the "M30" prefix in 1981.<ref>{{cite web |title=BMW M68 car engine 2.5 litre |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3940974 |website=www.bmw-grouparchiv.de |access-date=4 April 2021 |archive-date=27 November 2018 |archive-url=https://web.archive.org/web/20181127025356/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3940974 |url-status=dead }}</ref><ref name="carthrottle.com">{{cite web |title=Bow Down To The E28 M5; Performance Cars Would Be Nothing Without It |url=https://www.carthrottle.com/post/bow-down-to-the-bmw-e28-m5-the-performance-car-world-would-be-nothing-without-it/ |website=www.carthrottle.com |date=18 May 2015 |access-date=1 December 2018 |language=en}}</ref><ref name="drive4corners.com">{{cite web |title=The Beginning of a Legacy – A BMW Motor Evolution |url=http://drive4corners.com/beginning-legacy-bmw-motor-evolution/ |website=www.drive4corners.com |date=5 November 2014 |access-date=1 December 2018}}</ref>

Common features between the M10 and M30 include a profile lowering 30-degree slant to the right, a [[crossflow cylinder head]], and chain-driven camshaft with rocker arm valve actuation.<ref>{{cite book | last = Cranswick | first = Marc | title = The BMW 5 series and X5: a history of production cars and tuner specials, 1972-2008 | date = 2010 | publisher = McFarland | location = Jefferson, NC | isbn = 978-0786443512}}</ref> Further similarities include a cast-iron block with an aluminium head and a forged crankshaft. The first two M30 engines introduced were the {{cvt|2494|cc|L|1|disp=flip}} and the {{cvt|2788|cc|L|1|disp=flip}} versions, which both used an {{convert|86|mm|in|2|abbr=on}} bore.<ref name="AU71"/>

==M30B35LE/M90 engine== {{main|BMW M88#M90}} The M30B35LE engine, also called the M90, was used in several models from 1979-1982. It combines the block from the motorsports [[BMW M88]] DOHC engine with the M30's SOHC cylinder head.

== Versions == {|class="wikitable sortable" style="text-align: center;" !Version!!Displacement!!Power output!!Torque!!Year |- | M30B25V ||rowspan=2|{{convert|2494|cc|cuin|1|abbr=on}} ||rowspan=2|{{cvt|150|PS|kW PS bhp|0|order=out}} at 6,000 rpm ||{{convert|211|Nm|lbft|0|abbr=on}} at 3,700 rpm ||1968 |- | M30B25 || {{convert|215|Nm|lbft|0|abbr=on}} at 3,700 rpm || 1981 |- | M30B28V ||rowspan=2|{{convert|2788|cc|cuin|1|abbr=on}} ||{{cvt|170|PS|kW PS bhp|0|order=out}} at 6,000 rpm ||{{convert|235|Nm|lbft|0|abbr=on}} at 3,700 ||1968 |- | M30B28 ||{{convert|135|kW|bhp|0|abbr=on}} at 5,800 rpm ||{{convert|240|Nm|lbft|0|abbr=on}} at 4,200 rpm ||1977 |- | M30B30V ||rowspan=2|{{convert|2986|cc|cuin|1|abbr=on}} ||{{cvt|180|PS|kW PS bhp|0|order=out}} at 6,000 rpm ||{{convert|255|Nm|lbft|0|abbr=on}} at 3,700 rpm ||1971 |- | M30B30 ||{{cvt|200|PS|kW PS bhp|0|order=out}} at 5,500 rpm ||{{convert|272|Nm|lbft|0|abbr=on}} at 4,300 rpm ||1971 |- | M30B32 ||{{convert|3210|cc|cuin|1|abbr=on}} ||{{cvt|200|PS|kW PS bhp|0|order=out}} at 5,500 rpm ||{{convert|285|Nm|lbft|0|abbr=on}} at 4,300 rpm ||1976 |- | M30B33V ||{{convert|3295|cc|cuin|1|abbr=on}} ||{{convert|139|kW|bhp|0|abbr=on}} at 5,500 rpm ||{{convert|289|Nm|lbft|0|abbr=on}} at 3,500 rpm ||1973 |- | M30B34 ||rowspan=2|{{convert|3430|cc|cuin|1|abbr=on}} ||{{convert|160|kW|bhp|0|abbr=on}} at 5,800 rpm ||{{convert|310|Nm|lbft|0|abbr=on}} at 4,200 rpm |||1982 |- | M30B35 ||{{convert|155|kW|bhp|0|abbr=on}} at 5,700 rpm ||{{convert|305|Nm|lbft|0|abbr=on}} at 4,000 rpm ||1988 |}

The first {{convert|2494|cc|cuin|1|abbr=on}} version of the M30 was introduced in the 1968 [[BMW New Six#Sedans (E3)|E3 2500]]. This version uses dual [[Solex Carburetor|Solex]] ''Zenith 35/40 INAT'' carburettors, has a compression ratio of 9.0:1 and produces {{convert|110|kW|PS bhp|0|abbr=on}} in most applications.<ref name=BC3840530>{{cite web |title=BMW Classic - BMW 525 (E12) |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3840530 |website=www.bmw-grouparchiv.de |access-date=14 March 2021 |archive-date=1 December 2018 |archive-url=https://web.archive.org/web/20181201014530/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3840530 |url-status=dead }}</ref> It has a [[bore (engine)|bore]] of {{convert|86|mm|2|abbr=on}} and a [[stroke (engine)|stroke]] of {{convert|71.6|mm|2|abbr=on}}.

The M30B25 has previously been called the ''M06'' and ''M68'', prior to BMW retroactively renaming it the M30B25V (V for ''Vergaser''- carburettor in German).<ref name=Easter>{{cite web|title=Easter Special: History of BMW motorsport, inc the factory 959BHP M30|url=http://www.bimmernut.com/forum/5-series-bmw/20836-easter-special-history-bmw-motorsport-inc-factory-959bhp-m30-2.html|website=www.bimmernut.com|archive-url=https://web.archive.org/web/20121126092045/http://www.bimmernut.com/forum/5-series-bmw/20836-easter-special-history-bmw-motorsport-inc-factory-959bhp-m30-2.html|archive-date=26 November 2012}}</ref>

Applications: * 1968–1977 [[BMW New Six#Sedans (E3)|E3]] 2500 * 1974–1975 [[BMW E9#2.5 CS|E9 2.5 CS]] * 1973–1976 [[BMW 5 Series (E12)|E12]] 525 — {{cvt|145|PS|kW PS hp|0|order=out}},<ref name=BC3840530/> Solex 4A1 carburettor{{citation needed|date=April 2021}} * 1976–1981 [[BMW 5 Series (E12)|E12]] 525

=== M30B25 === In 1981, [[Jetronic#L-Jetronic (1974–1989)|Bosch L-Jetronic]] electronic fuel injection was added to the {{convert|2494|cc|cuin|1|abbr=on}} version. Peak power remained unchanged at {{convert|110|kW|bhp|0|abbr=on}}, however torque increased slightly to {{convert|215|Nm|lbft|0|abbr=on}}.

Applications: * 1981-1987 [[BMW 5 Series (E28)|E28]] 525i<ref>{{cite web|title=1981 BMW E28 525i Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/230/BMW-E28-5-Series-525i.html|website=www.ultimatespecs.com|access-date=1 September 2017}}</ref> * 1981-1986 [[BMW 7 Series (E23)|E23]] 725i<ref>{{cite web|title=1981 bmw E23 725i Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/1421/BMW-E23-7-Series-725i.html|website=www.ultimatespecs.com|access-date=1 September 2017}}</ref><ref>{{cite web|title=1986 BMW 725i (model up to mid-year 1986 for Europe ) specifications|url=http://www.automobile-catalog.com/car/1986/264395/bmw_725i.html|website=www.automobile-catalog.com|access-date=1 September 2017}}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref>

=== M30B28V === In its original form, the carburetted 2.8 used two [[Solex Carburetor|Solex]] Zenith "35/40 INAT" [[carburetors]], the compression ratio is 9.0:1 and the engine produces {{cvt|170|PS|kW PS hp|0|order=out}} and {{cvt|24.0|kgm|Nm lbft|0|order=out}}.<ref name="AU71"/>{{refpage|page=77}} The specifications went on to vary depending on the model year, carburettor and country. The bore is {{convert|86|mm|2|abbr=on}} and the stroke is {{convert|80|mm|2|abbr=on}}.

This version has also been known as the ''M06'' and ''M68'', prior to BMW renaming it the M30B28V.

Applications: * 1968-1977 [[BMW New Six#Sedans (E3)|E3]] 2800 / 2.8L — {{cvt|170|PS|kW PS hp|0|order=out}}<ref>{{cite web |title=1975 BMW 2.8 L E3 specifications & stats |url=https://www.carfolio.com/specifications/models/car/?car=153175 |website=www.carfolio.com |access-date=29 December 2018}}</ref><ref name=Oswald>{{cite book |last=Oswald |first=Werner |title= Deutsche Autos 1945-1990, Band 4|edition=1|year=2001 |publisher=Motorbuch Verlag |location=Stuttgart |isbn=3-613-02131-5}}</ref> * 1968-1971 [[BMW E9#2800CS|E9]] 2800 CS — {{convert|125|kW|PS bhp|0|abbr=on}}<ref>{{cite web |title=Detailed specs review of 1971 BMW 2800 CS offered up to April 1971 for Europe Australia |url=https://www.automobile-catalog.com/car/1971/78125/bmw_2800_cs.html |website=www.automobile-catalog.com |access-date=14 March 2021}}</ref> * 1971-1971 [[BMW New Six#Sedans (E3)|E3]] Bavaria — {{convert|168|hp|kW|order=flip|abbr=on|0}},<ref>{{cite web |title=Detailed specs review of 1971 BMW Bavaria offered since mid-year 1970 for North America U.S. |url=https://www.automobile-catalog.com/car/1971/77870/bmw_bavaria.html |website=www.automobile-catalog.com |access-date=14 March 2021 }}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite web |title=1971 BMW Bavaria |url=https://www.goodingco.com/vehicle/1971-bmw-bavaria/ |website=www.goodingco.com |access-date=14 March 2021 |language=en |archive-date=3 December 2020 |archive-url=https://web.archive.org/web/20201203032443/https://www.goodingco.com/vehicle/1971-bmw-bavaria/ |url-status=dead }}</ref> United States only * 1974-1976 [[BMW 5 Series (E12)|E12]] 528 — {{cvt|165|PS|kW PS hp|0|order=out}} dual Zenith INAT carburettors<ref>{{cite book |title=Betriebsanleitung 518, 520, 525, 528, 520i |date=15 January 1975 |publisher=BMW |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3272432 |access-date=29 December 2018 |archive-date=29 December 2018 |archive-url=https://web.archive.org/web/20181229171346/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3272432 |url-status=dead }}</ref>{{refpage|page=89}}<ref>{{cite web|title=1974 BMW E12 5 Series 528 Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/1292/BMW-E12-5-Series-528.html|website=www.ultimatespecs.com|access-date=1 September 2017}}</ref><ref>{{cite web|title=1974 BMW 528 (model since mid-year 1974 for Europe Australia ) specifications|url=http://www.automobile-catalog.com/car/1974/170960/bmw_528.html|website=www.automobile-catalog.com|access-date=1 September 2017|archive-date=3 December 2024|archive-url=https://web.archive.org/web/20241203231301/https://www.automobile-catalog.com/car/1974/170960/bmw_528.html|url-status=dead}}</ref> * 1976-1978 [[BMW 5 Series (E12)|E12]] 528 — {{cvt|125|kW|PS bhp|0}}, [[Solex Carburetor|Solex]] 4A1 carburettor<ref>{{cite book |title=Fahrzeugprospekt 518 520 520i 525 528 |date=January 1977 |publisher=BMW |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3155591 |access-date=29 December 2018 |archive-date=29 December 2018 |archive-url=https://web.archive.org/web/20181229171630/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3155591 |url-status=dead }}</ref>{{refpage|page=25}} * 1977-1979 [[BMW 7 Series (E23)|E23]] 728 — {{cvt|125|kW|PS bhp|0}}, Solex 4A1 carburettor<ref>{{cite web |title=1977 BMW 728 E23 specifications & stats |url=https://www.carfolio.com/specifications/models/car/?car=56067 |website=www.carfolio.com |access-date=29 December 2018}}</ref>

=== M30B28 === In 1977, Bosch L-Jetronic electronic fuel injection was added to the {{convert|2788|cc|cuin|1|abbr=on}} version.<ref name=Oswald /> Power increased to {{convert|135|kW|bhp|0|abbr=on}} and torque increased to {{convert|240|Nm|lbft|0|abbr=on}}.

* 1977-1978 [[BMW 5 Series (E12)|E12]] 528i — North America only, {{convert|129|kW|bhp|0|abbr=on}}, 9.0:1 compression ratio * 1978-1981 [[BMW 5 Series (E12)|E12]] 528i — {{cvt|177|PS|kW PS hp|0|order=out}}<ref>{{cite web |title=1977 BMW E12 5 Series 528i Technical Specs |url=https://www.ultimatespecs.com/car-specs/BMW/1400/BMW-E12-5-Series-528i.html |website=www.ultimatespecs.com |access-date=9 December 2018 |language=en}}</ref> * 1979-1986 [[BMW 7 Series (E23)|E23]] 728i * 1979-1987 [[BMW 6 Series (E24)|E24]] 628CSi * 1981-1987 [[BMW 5 Series (E28)|E28]] 528i<ref>{{cite web|title=1981 BMW 528i E28|url=http://www.carfolio.com/specifications/models/car/?car=31713|website=www.carfolio.com}}</ref>

=== M30B30V === Based on the M30B28V version with a {{convert|3|mm|in|abbr=on}} larger bore, the M30B30V produces {{cvt|180|PS|kW PS bhp|0|order=out}} and {{convert|255|Nm|lbft|0|abbr=on}},<ref>{{cite web|title=1971 BMW 3.0 S (model since April 1971 for Europe Australia ) specifications|url=http://www.automobile-catalog.com/car/1971/77660/bmw_3_0_s.html|website=www.automobile-catalog.com|access-date=1 September 2017}}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref><ref>{{cite web|title=1971 BMW E9 3.0 CS Technical Specifications|url=https://www.ultimatespecs.com/car-specs/BMW/19720/BMW-E9-30-CS.html|website=www.ultimatespecs.com|access-date=1 September 2017}}</ref> uses dual Zenith 35/40 INAT carburettors and has a compression ratio of 9.0:1. In United States trim, this engine produced {{cvt|170|hp|kW hp|0|order=out}} at 5800 rpm.<ref name=scimp>{{Cite book | ref = SCimp | title = Standard Catalog of Imported Cars, 1946-1990 | first = James M. | last = Flammang | publisher = Krause Publications, Inc. | location = Iola, WI | pages = 176–177 | date = 1994 | isbn = 0-87341-158-7 }}</ref>

Applications: * 1971-1975 [[BMW E9#3.0CS and variants|E9]] 3.0 CS * 1971-1972 [[BMW E9#3.0CS and variants|E9]] 3.0 CSL * 1971-1974 [[BMW New Six#Sedans (E3)|E3]] 3.0 S / 3.0 L / Bavaria * 1976-1979 [[BMW 6 Series (E24)|E24]] 630 CS — {{cvt|136|kW|PS bhp|0}}, Pierburg 4A1 carburetor<ref name=Oswald /><ref>{{cite web|title=1976 BMW 630 CS E24|url=http://www.carfolio.com/specifications/models/car/?car=17567|website=www.carfolio.com|access-date=1 September 2017}}</ref> * 1977-1979 [[BMW 7 Series (E23)|E23]] 730 — {{cvt|135|kW|PS bhp|0}}, Solex 4 A 1 carburettor<ref>{{cite web|title=BMW 730, 1977 MY E23|url=http://www.carfolio.com/specifications/models/car/?car=253550|website=www.carfolio.com|access-date=1 September 2017}}</ref>

=== M30B30 === The fuel injected version of the {{convert|2986|cc|cuin|1|abbr=on}} M30 debuted in 1971 in the E9 3.0 CSi and initially used the [[Jetronic#D-Jetronic (1967–1979)|Bosch D-Jetronic]] mechanical fuel injection system.<ref name="autospeed">{{cite web|title=The BMW Six Cylinder Guide|url=http://www.autospeed.com/cms/article.html?&title=The-BMW-Six-Cylinder-Guide&A=2948|website=www.autospeed.com|access-date=8 September 2017}}</ref> In 1976, the fuel injection system was upgraded to Bosch L-Jetronic electronic fuel injection.<ref name="autospeed"/> The M30B30 produces up to {{cvt|200|PS|kW PS bhp|0|order=out}} and {{cvt|27.7|kgm|Nm lbft|0|order=out}},<ref name="TAM74/75">{{Cite book | title = Quattroruote: Tutte le Auto del Mondo 74/75 | publisher = Editoriale Domus S.p.A | date = 1974 | ref = TAM75 | language = Italian | page = 84 | location = Milano }}</ref> depending on the model year and whether a catalytic converter is fitted. The compression ratio is 9.2:1. With catalytic converter, compression ratio is 9:1.

Applications: * 1971-1975 [[BMW E9|E9]] 3.0 CSi — {{cvt|200|PS|kW PS bhp|0|order=out}}<ref name="TAM74/75"/> * 1972-1973 [[BMW E9|E9]] 3.0 CSL — {{cvt|200|PS|kW PS bhp|0|order=out}} * 1972-1975 [[BMW New Six#Sedans (E3)|E3]] 3.0 Si — {{convert|147|kW|bhp|0|abbr=on}} * 1975-1978 [[BMW 5 Series (E12)|E12]] 530i — North America only, {{convert|131|kW|bhp|0|abbr=on}}<ref>{{cite web|title=1974 BMW E12 5 Series 530i(USA) Specs|url=https://www.ultimatespecs.com/car-specs/BMW/1293/BMW-E12-5-Series-530i(USA).html|website=www.ultimatespecs.com|access-date=1 September 2017}}</ref> * 1976-1976 [[BMW 5 Series (E12)|E12]] 530 MLE — South Africa only, {{convert|147|kW|bhp|0|abbr=on}}<ref>{{cite web|title=1976 BMW 530 MLE E12|url=http://www.carfolio.com/specifications/models/car/?car=131868|website=www.carfolio.com|access-date=1 September 2017}}</ref> * 1977-1978 [[BMW 6 Series (E24)|E24]] 630CSi — North America only, {{convert|129|kW|bhp|0|abbr=on}}<ref>{{cite web|title=1976 BMW 630 CSi E24|url=http://www.carfolio.com/specifications/models/car/?car=14278|website=www.carfolio.com|access-date=1 September 2017}}</ref> * 1986-1995 [[BMW 7 Series (E32)|E32]] 730i — {{convert|138|kW|bhp|0|abbr=on}}<ref>{{cite web |title=BMW 730i 6-cyl. (E32) |url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3843347 |website=bmw-grouparchiv.de |access-date=14 August 2019 |archive-date=26 December 2017 |archive-url=https://web.archive.org/web/20171226185456/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3843347 |url-status=dead }}</ref><ref name="bmw-grouparchiv.de">{{cite web |title=1992 7 Series User Manual |url=https://bmw-grouparchiv.de/research/media/4015c3ab-a2c3-40fe-b741-4fd549797a3b/web |website=bmw-grouparchiv.de |access-date=9 December 2018}}</ref> * 1988-1990 [[BMW 5 Series (E34)|E34]] 530i — {{convert|138|kW|bhp|0|abbr=on}}

=== M30B32 === Despite having a capacity of {{convert|3210|cc|cuin|1|abbr=on}}, this engine appeared in many cars badged so as to suggest {{convert|3.3|L|cuin|0|abbr=on}} of displacement- such as the 633i, 3.3 Li, and 733i. The compression ratio is 8.8:1. In the E24 633CSi coupe, the M30B32 uses Bosch L-Jetronic electronic fuel injection.<ref name=Oswald /> The US version used L-Jetronic from 1978 until mid-1981, changing over to [[Motronic]] digital fuel injection in June of that year. The 1979 732i is BMW's first use of Bosch's Motronic fuel injection.<ref>{{cite web|title=BMW M30 and M102 Six Cylinder Engines|url=http://www.unixnerd.demon.co.uk/m30.html|website=www.unixnerd.demon.co.uk|access-date=1 September 2017|archive-date=21 December 2016|archive-url=https://web.archive.org/web/20161221232350/http://www.unixnerd.demon.co.uk/m30.html|url-status=dead}}</ref> The bore is {{convert|89|mm|2|abbr=on}} and the stroke is {{convert|86|mm|2|abbr=on}}.

Applications: * 1973-1975 [[BMW E9|E9]] 3.0 CSL — {{cvt|206|PS|kW PS hp|0|order=out}}, {{convert|3153|cc|cuin|1|abbr=on}} * 1976-1984 [[BMW 6 Series (E24)|E24]] 633CSi — {{convert|145|or|147|kW|PS bhp|0|abbr=on}} in Euro spec, {{convert|128-130|kW|bhp|0|abbr=on}} in USA spec * 1976-1979 [[BMW New Six#E3|E3]] 3.3 Li — {{cvt|147|kW|PS bhp|0}}<ref>{{cite web|title=1977 BMW 3.3 Li (model up to mid-year 1977 for Europe ) specifications|url=http://www.automobile-catalog.com/car/1977/77855/bmw_3_3_li.html|website=www.automobile-catalog.com|access-date=1 September 2017}}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> * 1977-1984 [[BMW 7 Series (E23)|E23]] 733i — {{cvt|147|kW|PS bhp|0}} in Euro spec,<ref>{{cite web|title=BMW 733i, 1977 MY E23|url=http://www.carfolio.com/specifications/models/car/?car=253517|website=www.carfolio.com|access-date=1 September 2017}}</ref> {{convert|130-145|kW|bhp|0|abbr=on}} in USA spec * 1979-1981 [[BMW 5 Series (E12)|E12]] 533i — North America only, {{convert|135|kW|bhp|0|abbr=on}}<ref>{{cite web|title=1984 BMW 533i (model since mid-year 1983 for North America U.S.) specifications|url=http://www.automobile-catalog.com/car/1984/263720/bmw_533i.html|website=www.automobile-catalog.com|access-date=1 September 2017}}{{Dead link|date=July 2025 |bot=InternetArchiveBot |fix-attempted=yes }}</ref> * 1979-1986 [[BMW 7 Series (E23)|E23]] 732i — {{convert|144|kW|PS bhp|0|abbr=on}} * 1982-1984 [[BMW 5 Series (E28)|E28]] 533i — North America only, {{cvt|135|kW|hp PS|0}} * 1984-1986 [[BMW 3 Series (E30)|E30]] 333i — South Africa only, {{cvt|145|kW|hp PS|0}}, special ALPINA Intake plenum and exhaust manifold, modified L-Jetronic Injection. Only 210 (including six test cars) were produced for local Group 1 homologation.<ref>{{cite web | url = https://www.speedhunters.com/2019/10/333i-south-africas-answer-e30-m3/ | archive-url = https://web.archive.org/web/20221222170657/https://www.speedhunters.com/2019/10/333i-south-africas-answer-e30-m3/ | archive-date = 2022-12-22 | title = 333i: South Africa's Answer To The E30 M3 | first = Stefan | last = Kotzé | date = 2019-10-02 | work = Speedhunters | publisher = Electronic Arts Inc. }}</ref>

=== M30B33V === The carburetted M30B33 produces {{cvt|190|PS|kW PS bhp|0|order=out}} and {{convert|289|Nm|lbft|0|abbr=on}}.<ref name="AR74">{{citation | ref = AR74 | title = Automobil Revue '74 | editor1-last = Braunschweig | editor1-first = Robert | display-editors = et al | language = de, fr | publisher = Hallwag AG | page = 199 | location = Berne, Switzerland | volume = 69 | date = 14 March 1974 | isbn = ((3-444-66015-1)) }}</ref><ref name=WC75>{{Cite book | title = World Cars 1975 | publisher = L'Editrice dell'Automobile LEA/Herald Books | location = Pelham, NY | ref = WC75 | page = 109 | year = 1975 | isbn = 0-910714-07-X }}</ref> It has a bore of {{convert|89|mm|2|abbr=on}} and a stroke of {{convert|88|mm|2|abbr=on}}.

Applications: * 1973-1975 [[BMW New Six#E3|E3]] 3.3 L<ref>{{cite web|title=E3 3.3L model selection|url=http://www.realoem.com/bmw/en/select?product=P&archive=1&series=E3&body=Lim&model=3.3L&market=EUR&prod=19740100&engine=M30&steering=L|website=www.realoem.com|access-date=1 September 2017}}</ref>

=== M30B34 === The M30B34 engines sold in Europe and most other markets used a 10.0:1 compression ratio and produced {{cvt|218|PS|kW PS hp|0|order=out}}.<ref>{{cite web|title=1985 BMW E28 5 Series M535i Specs|url=http://www.ultimatespecs.com/car-specs/BMW/1270/BMW-E28-5-Series-M535i.html|website=www.ultimatespecs.com}}</ref> In North America and Japan, the M30B34 used an 8.0:1 compression ratio and produced {{cvt|185|PS|kW PS hp|0|order=out}}.<ref>{{cite web|title=1985 BMW E28 5 Series M535i Kat Specs|url=http://www.ultimatespecs.com/car-specs/BMW/1410/BMW-E28-5-Series-M535i-Kat.html|website=www.ultimatespecs.com}}</ref> This engine was also offered in Europe from the latter half of 1985 until mid-1987.<ref name=Oswald />{{refpage|page=238}} In all markets, the Bosch Motronic digital fuel injection system was used. The bore is {{convert|92|mm|2|abbr=on}} and the stroke is {{convert|86|mm|2|abbr=on}}.

Applications: * 1982-1987 [[BMW 7 Series (E23)|E23]] 735i / L7 * 1982-1987 [[BMW 6 Series (E24)|E24]] 635CSi / L6 — {{cvt|218|PS|kW|0}} in Euro spec<ref name=Oswald />{{refpage|page=241}} * 1985-1988 [[BMW 5 Series (E28)|E28]] 535i / 535is / M535i

===M30B35=== [[File:Bmw-m30b35-right.jpg|thumb|right|M30B35]]

This engine has a capacity of {{convert|3430|cc|cuin|1|abbr=on}}, despite the "B35" model code. It produces {{cvt|155|kW|PS hp|0}} at 5700 rpm and {{cvt|305|Nm|lbft|0}} at 4000 rpm, has a compression ratio of 9.0:1 and uses [[Motronic#1.3|Bosch Motronic 1.3]] digital fuel injection.<ref name=Oswald /> It was also offered without a catalytic converter for certain markets; this version produces {{cvt|162|kW|PS hp|0}} and {{cvt|315|Nm|lbft|0}} at the same engine speeds.<ref name=PressE32>{{Cite book|url=https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3562886|title=BMW 7' [E32] Pressevorstellung|trans-title=BMW 7 (E32) Press Presentation|language=de|date=8 September 1986|pages=56–57|publisher=BMW AG|access-date=30 December 2018|archive-date=30 December 2018|archive-url=https://web.archive.org/web/20181230181155/https://bmw-grouparchiv.de/research/detail/index.xhtml?id=3562886|url-status=dead}}</ref>

Applications: * 1988-1989 [[BMW 6 Series (E24)|E24]] 635CSi * 1986-1992 [[BMW 7 Series (E32)|E32]] 735i<ref name=PressE32/><ref>{{Cite web|url=https://www.ultimatespecs.com/car-specs/BMW/1591/BMW-E32-7-Series-735i.html|title=BMW E32 7 Series 735i Technical Specs, Dimensions|website=www.ultimatespecs.com|language=en|access-date=2018-12-29}}</ref> * 1987-1992 [[BMW 5 Series (E34)|E34]] 535i * 1988-1989 [[Laforza|Rayton Fissore Magnum 3.5]]<ref name="AR89">{{cite book | ref = AR89 | title = Automobil Revue 1989 | editor-last = Büschi | editor-first = Hans-Ulrich | publisher = Hallwag AG | location = Berne, Switzerland | language = de, fr | page = 498 | volume = 84 | date = March 9, 1989 | isbn = 3-444-00482-6 }}</ref>

==Turbocharging== The M30 was the basis for the turbocharged M102 and M106 engines.

The [[Alpina B10 Biturbo]] used a modified version of the M30, with two turbochargers and forged pistons. Producing {{cvt|265|kW|PS bhp|0}} at 6000 rpm and {{cvt|520|Nm|lbft|0}} at 4000 rpm, the engine made this car the fastest sedan in the world. The final 50 M30 blocks were shipped to Alpina for use in the final 50 B10 Biturbos.<ref>{{cite journal|last=Palevsky|first=Alexander|title=Blown Away|journal=Bimmer Magazine|issue=October 2007|page=62}}</ref>

===M102=== The M102 was produced from 1980 to 1982. It was BMW's first turbocharged six-cylinder engine.

The M102 (also known as ''M30B32LAE'')<ref>{{cite web |url=http://www.bmwe23.nl/http/BMW%20Engine%20Numbers.htm |title=BMW Engine Numbers |access-date=2012-08-18 |url-status=dead |archive-url=https://web.archive.org/web/20131115021836/http://www.bmwe23.nl/http/BMW%20Engine%20Numbers.htm |archive-date=2013-11-15 }}</ref> has a displacement of {{convert|3210|cc|cuin|1|abbr=on}}.<ref>{{Cite web|url=http://www.bmwheaven.com/database/engine.php?type=M30#/131|title=BMW Heaven Specification Database | Engine specifications for M30 engines|website=Bmwheaven.com|access-date=14 November 2021}}</ref> The [[Kühnle, Kopp & Kausch|KKK]] K27 turbocharger produces {{convert|9|psi|bar|abbr=on}} of boost<ref name="Turbo"/> and an air-to-air [[intercooler]] is used.<ref name="The BMW Six Cylinder Guide">{{cite web|title=The BMW Six Cylinder Guide|url=http://www.autospeed.com/cms/article.html?&title=The-BMW-Six-Cylinder-Guide&A=2948|website=Autospeed.com}}</ref> The compression ratio is 7.0:1.<ref name="Turbo">{{cite web|title=BMW 745i E23 Turbo|url=https://www.uniquecarsandparts.com.au/car_info_bmw_745i_turbo|website=Uniquecarsandparts.com.au|access-date=16 September 2017}}</ref>

The M102 produces {{cvt|188|kW|PS bhp|0}}<ref name="AutoSpeed"/> and was used in the [[BMW 7 Series (E23)|E23 7 Series]], in the model was designated "745i".<ref name="AutoSpeed">{{cite web | url = http://autospeed.com/cms/A_2107/article.html | title = 2004 Engine Epic - BMW Engines | access-date = 2008-05-01 | author = Michael Knowling | date = 2004-04-26 | work = AutoSpeed | publisher = Web Publications Pty Limited | archive-url= https://web.archive.org/web/20080509012508/http://autospeed.com/cms/A_2107/article.html| archive-date= 9 May 2008 | url-status= live}}</ref> The M102 was not available in right-hand drive cars, leading to the South African 745i using the [[BMW M88]] naturally aspirated DOHC straight-six engine instead.

Applications: * 1980–1982 [[BMW E23|E23]] 745i

===M106=== The M106 (also called ''M30B34MAE'') replaced the M102 and was produced from 1982 to 1986.

Some of the M106's upgrades over its predecessor are a result of the [[#M30B34|M30B34]] version of the M30, which was also released in 1982. These upgrades include [[Motronic|Bosch Motronic]] engine management and an increased displacement to {{convert|3430|cc|cuin|1|abbr=on}}. The compression ratio was increased from 7.0:1 to 8.0:1.<ref name="The BMW Six Cylinder Guide"/><ref name= "www.paultan.org"/>

Peak power output is the same {{cvt|185|kW|PS bhp|0}} as the M102,<ref>{{Cite web|url=http://www.bmwheaven.com/database/engine.php?type=M30#/135|title=BMW Heaven Specification Database | Engine specifications for M30 engines|website=Bmwheaven.com|access-date=14 November 2021}}</ref> however it occurs at lower RPM<ref name="www.paultan.org">{{Cite web|url=https://paultan.org/2008/01/24/the-m102-m106-in-the-bmw-745i-turbo/|title=The M102/M106 in the BMW 745i Turbo|website=Paultan.org|date=24 January 2008|access-date=14 November 2021}}</ref> and peak boost is reduced from {{convert|9|to|6|psi|bar|abbr=on}}.<ref>{{Cite web|url=https://www.uniquecarsandparts.com.au/car_info_bmw_745i_turbo|title=BMW 745i E23 Turbo|website=Uniquecarsandparts.com.au|access-date=14 November 2021}}</ref>

There was no direct successor to the M106, however BMW's next turbocharged petrol engine was the [[BMW N54]], introduced in 2006.

Applications: * 1982–1986 [[BMW E23|E23]] 745i

==Motorsport== [[File:BMW E24 635 CSi Grp A Works Original BMW Teile front side.JPG|thumb|right|E24 635 CSi Group A]]

The M30 block powered a series of [[BMW E9#Motorsport|E9 CSL]] and [[BMW 6 Series (E24)|E24 6 Series]] coupes to [[European Touring Car Championship]] (ETCC) throughout the 1970s and into the middle 1980s, as more powerful DOHC 24-valve heads had been developed for high-performance motorsports and street use. The [[BMW M49]] and later [[BMW M88]] high-performance engines are based on the M30 block.<ref>{{cite web|title=FAQ E23 745i SA (M88)|url=http://www.bmwmregistry.com/model_faq.php?id=4|website=www.bmwmregistry.com|access-date=1 September 2017}}</ref> {{clear}}

== See also == {{commons category|BMW M30 engine}} * [[BMW]] *[[BMW M10]], the four-cylinder engine that the M30 was based on. *[[BMW M20]], the smaller straight-six engine which was sold alongside the M30 for many years. *[[BMW M88]], the high-performance, [[DOHC]], straight-six engine that was sold alongside the M30 from 1978-1989 *[[BMW S38]], the catalyzed version of— and ultimately the successor to— the M88, which was sold alongside the M30 from 1986-1995. * [[List of BMW engines]]

==References== {{reflist|30em}}

[[Category:BMW engines|M30]] [[Category:Straight-six engines]] [[Category:Gasoline engines by model]] [[Category:1960s automobile engines]]